OBJC_EXTENSIONS --------------- .. versionadded:: 3.16 Boolean specifying whether compiler specific extensions are requested. This property specifies whether compiler specific extensions should be used. For some compilers, this results in adding a flag such as ``-std=gnu11`` instead of ``-std=c11`` to the compile line. This property is ``ON`` by default. The basic OBJC standard level is controlled by the :prop_tgt:`OBJC_STANDARD` target property. If the property is not set, and the project has set the :prop_tgt:`C_EXTENSIONS`, the value of :prop_tgt:`C_EXTENSIONS` is set for :prop_tgt:`OBJC_EXTENSIONS`. See the :manual:`cmake-compile-features(7)` manual for information on compile features and a list of supported compilers. This property is initialized by the value of the :variable:`CMAKE_OBJC_EXTENSIONS` variable if it is set when a target is created.